/* Copyright (C) 2004 - 2006  db4objects Inc.  http://www.db4o.com

This file is part of the db4o open source object database.

db4o is free software; you can redistribute it and/or modify it under
the terms of version 2 of the GNU General Public License as published
by the Free Software Foundation and as clarified by db4objects' GPL 
interpretation policy, available at
http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
Suite 350, San Mateo, CA 94403, USA.

db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. */
namespace Db4objects.Db4o.Internal.Handlers
{
	public sealed class ByteHandler : Db4objects.Db4o.Internal.Handlers.PrimitiveHandler
	{
		internal const int LENGTH = 1 + Db4objects.Db4o.Internal.Const4.ADDED_LENGTH;

		private static readonly byte i_primitive = (byte)0;

		public ByteHandler(Db4objects.Db4o.Internal.ObjectContainerBase stream) : base(stream
			)
		{
		}

		public override object Coerce(Db4objects.Db4o.Reflect.IReflectClass claxx, object
			 obj)
		{
			return Db4objects.Db4o.Foundation.Coercion4.ToSByte(obj);
		}

		public override int GetID()
		{
			return 6;
		}

		public override object DefaultValue()
		{
			return i_primitive;
		}

		public override int LinkLength()
		{
			return LENGTH;
		}

		protected override System.Type PrimitiveJavaClass()
		{
			return typeof(byte);
		}

		public override object PrimitiveNull()
		{
			return i_primitive;
		}

		internal override object Read1(Db4objects.Db4o.Internal.Buffer a_bytes)
		{
			byte ret = a_bytes.ReadByte();
			return ret;
		}

		public override void Write(object a_object, Db4objects.Db4o.Internal.Buffer a_bytes
			)
		{
			a_bytes.Append(((byte)a_object));
		}

		public override bool ReadArray(object array, Db4objects.Db4o.Internal.Buffer reader
			)
		{
			if (array is byte[])
			{
				reader.ReadBytes((byte[])array);
				return true;
			}
			return false;
		}

		public override bool WriteArray(object array, Db4objects.Db4o.Internal.Buffer writer
			)
		{
			if (array is byte[])
			{
				writer.Append((byte[])array);
				return true;
			}
			return false;
		}

		private byte i_compareTo;

		private byte Val(object obj)
		{
			return ((byte)obj);
		}

		internal override void PrepareComparison1(object obj)
		{
			i_compareTo = Val(obj);
		}

		public override object Current1()
		{
			return i_compareTo;
		}

		internal override bool IsEqual1(object obj)
		{
			return obj is byte && Val(obj) == i_compareTo;
		}

		internal override bool IsGreater1(object obj)
		{
			return obj is byte && Val(obj) > i_compareTo;
		}

		internal override bool IsSmaller1(object obj)
		{
			return obj is byte && Val(obj) < i_compareTo;
		}
	}
}
